Drinking cup



FIG. 1 is a perspective view showing the front, top and one side of a drinking cup which forms my new design;

FIG. 2 is a side elevational view thereof, this side and the opposite being mirror images;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a drinking cup, as shown and described. 